AdMeld, an advertising optimization platform for publishers, has been acquired by Google for around $400 million according to multiple sources.

Admeld’s mission is to keep premium publishers on the cutting edge of advertising technology, enabling them to maximize their revenue and sell their inventory smarter and safer. Our high-tech, high-touch approach generates the maximum yield for every ad impression by giving publishers access to demand from hundreds of sources (ad networks, DSPs, etc.) on their own terms.

Current Admeld customers include Answers.com, FOX News, IDG TechNetwork, Hearst Television, Discovery, The Weather Channel, and more than 500 others worldwide. Via Techcrunch